Plural plug



June 14, 1927. 1,631,995

C. E. WARNER PLURAL PLUG Filed June 29, 1922 Patented June 14, 1 927.

UNITED-STATES PATENT OFFICE.

MANUFACTUR NG NOIS.

HEST R E. YWARFNER; or nnaiwxn, nan-nets, ASSIGNOR T BENJAMIN ELECTLRIC Cr mean-1r, or omeaeo, ILLINOIS, A CORPORATION or ILLI- 'rL nAr. 1 Pine.

Application filed June as, 1,922. 1 Serial No. 571, 59.

My invention relates to electrical conned socket or receptacle thatit doeswhen "used without. the two-way plug. It isalso desir' able that the shell contacts shouldbe molded into the insulating base of the plug before any of the electrical connections aresecured thereto. This has been difficult to do in the past on account of the difiiculty of making the electrical connections after: the shell contacts were molded into the base.

Another objection to the ordinary twoway plug of this type has been that no provision has been made for moving the angular receptacle to any desired position around the axial line of the plug after the plug has been screwed into a socket.

Inmy invention I have successfully over-v come these diificulties and it has for one of its objects to provide a plural plughaving the receptacle shell contacts molded into a unitary mass of insulating material and in which the axis of one of the receptacles is in substantially parallel relation to the axis of the plug portion.

Another object of invention is to provide a two-way plug having receptacle contactsmolded into a unitary mass of insulating material and having the axial line of one of the receptacles in substantially parallel relation with the plug portion and the axial line of the other receptacle in. angular relation to the axes of-both the plug portion and I the parallel receptacle.

Another object of my invention is to provide a swivel two-Way plug in whichthe receptacle contacts are molded into a unitary mass of insulating material having the plug portion and one of the receptacle contacts in parallel relation and in which the angularly disposed receptacle portion may beadjustably rotated around the axis of the plug portion. 4 Another object of my invention is to provide animproved two-way plug of few parts which will be durable and efiicient in use, simple in construction, cheap to nianufaoture and easy to assemble.

In a two-way plug it is de- A further object of my invention is to provide improved means for assembling a two-way plug in which the shell receptacle contacts are molded into an insulating housing and; positioning member. i

Fnrtherobjects will appear from the de tailed description to, follow and from the appended claim.

In the drawings in which an embodiment ofiny inventionis shown: u o a l igure 1 is a side elevation of my mproved plug embodying my invention;

Fig. 5 is a transverse sectional view taken on line 55 of Fig. 4;. Fig. 6 is a plan view of the spring washer for providingfrictional and electrical contiilctlbe'tweenthe base portion and the swivel s I Fig. 7 is a perspective view of the shell connector;

Fig. 8 is a vertical longitudinal section of the base showing the threaded shell contacts molded in; and 1 t Fig. 9 is a top View of the base portion as shown in-Fig. 8; 1 l

Referring now to the drawings in detail,

in my invention as illustrated, I provide a base portion 10 and a plug portion 11, the

base portion com'prising a unitary mass of contacts 12 and. 1.3 which. are molded therein, the axis of the threadedshell contact 12 being in substantially parallel relation to the axis ofthe plug portion 11 and slightly oil'- set therefrom, and the. side receptacle shell Contact 13 being angularly disposed withrelation to the axis of the plug portion and the receptacle shell contact 12. The receptacles are provided with suitable center contacts 14 and 15.

The plug portion 11 comprises a plug base 16 having a swivel shell contact 17 mounted thereon. The plug portion is also provided with a center Contact 18 which in the construction shown is the head of the screw 19 which extends through the axial opening 2Ov in the plug base 16. The receptacle center contact screws 14 and 15 extend through the openings 21 and 22 respectively, and are threaded into the supporting member 23, the supporting member being arranged to rest on the shoulder 24 in the base 10, the portion 25 of the supporting member being turned upwardly to receive the receptacle center contact screw 15. contact screw 19 is also screwed into the supporting member 23, thus securing all of the parts in operative relation.

The receptacle shell contact 12 is provided with an upwardly. extending portion 26 which is sheared out of the end of the receptacle shell contact 12 after the insulating base has been molded, as shown in Fig. 8, and is bent upwardly and into contact with the receptacle shell contact lS, as illustrated in Fig. 3. r

The connector 27 is inserted in the opening 28 and is clamped against the upwardly extending lug 26 by means of the screw 29 extending through the threaded shell contact 13, thus securing thethreaded shell contact 13 and the threaded shell contact 12 and the connector 27 securely in electrical contact. The threaded shell contact 13 is drilled to receive the screw 29 after the shells are molded in the insulating base. The conned tor 27 extends upwardly and to one side of the supporting member 23 and is formed at 30 to receive the screw 31. which is arranged to clamp the spring friction washer 32 securely against the upper end of the base 10. The washer 82 is provided with the depressed portion arranged to engage a lug S4 in the base 1.0 to prevent relative movement between the'parls.

The threaded shell plug contact 17 is se cured to an insulating ring 35 ed with a shoulder 36 arranged in frictional engagement with the plug base 16. The threaded shell plug contact 17 is also provided with an outwardly turned portion 37 arranged to engage the spring friction washer 32, thus providing an electrical con nection through the threaded shell plug contact, through the spring washer 32, the screw 31, the connector 27 and by means of the clamping screw 29, through the threaded The plug center and is providshell contacts 12 anda13. It will also be noted that all of the center contacts are electrically connected by means of the supporting member 23.

V The plug base 16 is revented from rotating with relation to t e base 10 by means of the lugs 38 on the spring washer 32 extending into the openings 89 therein.

lVhen the center contact screw 19 is screwed into the connector 23, all the parts are held securely in assembled relation. The screw 19 is tightened sufliciently to hold all of the partsrigidly in fixed relation to each other while the plug portion is being screwed into a receptacle, a further pressure on the base 10 will allow it to be turned, thereby enabling the user to place the angular threaded shell receptacle 13 in any desired position; I i

The inner. ends of the receptacle shells are substantially frusto-conical as illustrated thereby allowing the device to be made. considerably smaller than would otherwise b the case.

A standard. shade holder thread 40 is molded in the base portion 10 as illustrated, and arranged to receive a standard shade holder, the molded beadll providing a stop for the shade holder.

WVhile I have shown but one form of my invention. it is obvious that it may be em bodied in other orms as covered. and delined by the appended claim.

Having thus fully described my in vention I claim as new andidesire to secure by Letters Patent:

A base for a two-way plug comprising an insulating housing and positioning member having a pair of threaded shell receptacle contacts molded therein, the ends of said i threaded shell receptacle contacts being substantially i rusto-conical shaped, the side of the trusto-conical shaped portion of one of said threaded shell receptacle contacts being in substantially parallel relation with the axis of the other threaded shell receptacle contact.

In witness whereof, I have scribed my name.

CHESTER E. WARNER.

hereunto sub 

